Let the City of South San Francisco help you replace that leaky old sewer lateral and help you pay for it! The City of South San Francisco's Sewer Lateral Grant Program will cover 50% of the cost, up to $2,500, by following program requirements. The City is offering a program to help residents improve their sewer systems and in the process help reduce inflow and infiltration (I&I) into the sewer lines, which can improve the quality of the waters of the San Francisco Bay.